To me the golden feature of this app is the "smart power" settings. If you know your FTP (or have a reasonable guess) you can set it to give assistance only above and beyond some percentage of your FTP (however much power you feel like you want to put out, based on how much of a workout you want). But the really neat thing is that then you can set a range of assistance that it's allowed to use to try to keep you in that power band. So for example say you want to put out 180 watts, you set the smart power level to 180 but you can also set the assistance level to say, 5% to 85%, which would mean: try to keep me at 180 watts, and you're allowed to vary the assistance between 5% and 85%. You can also tune how quickly or slowly the assistance ramps up or down when your power output varies.
The cool thing about this is that now 1 setting basically covers the vast majority of your riding. You just set and forget. I have mine customized so my 3 settings are:
- fixed 5% assist (for slow technical riding where I specifically don't want the motor lurching the bike forward)
- smart power set to 70% of my FTP and assit between 5% and 85% (I normally leave it here)
- fixed 100% assistance (basically shuttle mode)